Air-brake system.



10.746.101 y A PATBNTED DEc.a,j-19o3.

H.R.KUHN. y

. AIR BRAKE SYSTEM.

ArPLmATxoN funn un. 16. 1903.

. y///////l// i vrnezf No. 746,107. l

iUNITED ,"STATES Patented DecemberS, 1903.

PATENT OFFICE;

AIR-BRAKgEv-sYs-rcwl.

srncrrrcnrrolv'fermring part emettere Patent' No. 746,107,0iatea December 8, 1903; Appiie'et'ittinea Meret 1'6. 190s.,4 serai ne. 11n/,9691` (No modem To a/ZZ whom t may concern:

Beit known that I, HARRY R. KUHN, a citi- Zen of the United States, residing at Homeof which improvement the followingis a specication.

This invention relates to certain new and useful improvements in air-brake systems, and relates more particularly to providing means whereby When'a train is broken, due to passing overa grade or byany other cause, the brakes on the rear or broken- 0E portion of said trains are` set and the brakes on the forward portion of said train remain in their normal position.

A further object of this invention is to provide means whereby each car or unit of the train is provided with a system of ,valves whereby the breaking of said train between any of the units will cause the forwardlymoving valve on the front unit of the brokenolf portion of said train to be open and the rear valve on the forward end of said train to be closed, thereby maintaining the normal position in the forward end of said train and setting the brakes in the-rear portion thereof.

In describing `this invention in detail and more fully pointing out the samein the claims reference will be had to the accompanyingr drawings, forming a part of this specication, and in which like reference characters indicate like partsin the several views.

Figure 1 is an elevation of the valve which is interposed in the air-brake system. Fig. 2 is a longitudinal cross-section in elevation of the same. Fig. 3 is a cross-section taken on aline oo of Fig. 1. Fig. 4 isa diagrammatic view of the air-brake system, showing my improved valve interposed' in the same.

Referring to the accompanying drawings, the reference-numeral l indicates the casing .or body of the valve, in which the valve 2 is suitably mounted. Said valve 2 is provided on one side with a Web-guide 3, said guide being formed in a cross shape, two wings of which extend the entire distance of the guide and having formed therein an aperture in which the part 5 of the plug 6 operates and the other wings ot' which extend only a sufficient distance to form said guide.

On the forward end of the valve 2 is an extension 7, which' passes through the guidepi'ece 8, formed integrally withlor placed in the valve-body l and around which a spring is placed for the purpose of causing the valve 2 to move away from its seat 9 when the system is working under normal conditions.

The plug 6 of the valve has eccentrically mounted intermediate of its length the part 5, and its lower end 11 is rotatably-mounted `tion the eccentric portion of the plu'g 6 will be in such a position that it will permit the Valve 2 to become seated. 4 The operation of my device is as follows: Adjacent to the angle-cock placed on each end of the train-pipe of every car or unit is inserted one of the valves, such as illustrated in Figs. 1, 2, and 3. Should the train be moving in one direction, the valves will' be turned to such a position that should the train break the valve at the rear of the forward portion of said train will close, butthe forward valve of the rear portion of said train will open, thus permitting the exhaust of air from the train-pipe on the rear portion and setting the brakes on the same. This is accomplished by the position of the part 5v on the plug 6 being turned in one or two positions, in one of which it permits the valve 2- mal pressure is used, it will vbe SeenA that it ICO pered spring-pressed plug mounted therein said plug being rotatably mounted and carx5 rying a. part adapted to limit the movement of the spring-pressed Valve, mounted Within said valve-body.

In testimony whereof I have hereunto signed my name in the presence of two subzo scribing Witnesses.

HARRY R. KUHN.

In presence of LoUIs MoEsER, H. J. LEVIS. 

